“…The wide cost differences between QDU and hospitalized patients shown by our results (EUR 601.84 vs. 4,059.37) can be attributed mainly to staff costs, the hours worked, and the fixed costs of hospitalization (table 4), suggesting that diagnostic resources might be more effectively used by increasing QDU staff and, possibly, reducing internal medicine ward staff. In addition, studies have shown that care provided by medical residents may cost more than care not involving residents, with the difference sometimes being attributed to the resident’s lack of clinical judgment with respect to necessary and unnecessary procedures [35,36,37]. Ambulatory costs involving residents are almost double those attributed to attending specialists, mainly due to excessive diagnostic tests, especially magnetic resonance imaging and other radiology, more specialty consults per visit, twice as many hospitalizations, and more days of hospitalization [35].…”